CN103256013B - High-temperature-resisting and anti-stall joint of down-hole motor drilling tool - Google Patents
High-temperature-resisting and anti-stall joint of down-hole motor drilling tool Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- 210000000078 claw Anatomy 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims description 5
- 239000003208 petroleum Substances 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 230000036316 preload Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000009918 complex formation Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 206010033307 Overweight Diseases 0.000 description 1
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Abstract
本发明公开孔底动力钻具耐高温防失速节，包括外筒体、上传动轴、下传动轴、扭簧、卡瓦和预紧套，上传动轴的下端插入到下传动轴内并通过多头螺纹连接，在上传动轴和下传动轴连接处预留空间，外筒体套在上传动轴和下传动轴外，扭簧固定套在上传动轴上，扭簧下端与下传动轴顶部固定连接，下传动轴上部中空且为多个成环形均匀分布的抱爪，多个抱爪朝向轴心倾斜，在相邻两个抱爪之间的空隙间装有卡瓦，卡瓦和抱爪外表面为锥面，卡瓦外侧套有预紧套，预紧套与卡瓦之间通过螺纹咬合在一起。本发明减少钻进过程中的卡-滑效应，预防钻具累计过高扭矩能量，降低钻头停止转动的风险。配合涡轮钻具使用，克服涡轮钻具在大扭矩大钻压工况下的制动失速现象。
The invention discloses a high-temperature-resistant stall-proof joint of a power drilling tool at the bottom of a hole. Multi-threaded connection, reserve space at the connection between the upper transmission shaft and the lower transmission shaft, the outer cylinder is sleeved outside the upper transmission shaft and the lower transmission shaft, the torsion spring is fixedly sleeved on the upper transmission shaft, the lower end of the torsion spring is connected to the top of the lower transmission shaft Fixed connection, the upper part of the lower transmission shaft is hollow and has multiple claws evenly distributed in a ring shape. Multiple claws are inclined towards the axis center. Slips are installed in the gap between two adjacent claws. Slips and claws The outer surface of the claw is a tapered surface, and the outer side of the slip is covered with a pre-tightening sleeve, and the pre-tightening sleeve and the slip are engaged together through threads. The invention reduces the stuck-slip effect in the drilling process, prevents the drill tool from accumulating excessively high torque energy, and reduces the risk of the drill bit stopping to rotate. Used in conjunction with turbo drills, it overcomes the braking stall phenomenon of turbo drills under the conditions of high torque and high WOB.
Description
技术领域technical field
本发明涉及地质钻探领域，特别涉及一种以调节钻井扭矩为目的的孔下机械工具。The invention relates to the field of geological drilling, in particular to a downhole mechanical tool for the purpose of adjusting the drilling torque.
背景技术Background technique
在现有技术中，钻头旋转的驱动通常有地面驱动(转盘或者顶驱)和孔下动力钻具驱动两种主要方式。当采用地面驱动形式时，钻柱中往往累计大量的扭转能量，形成扭簧积累势能，在复杂的地层中，容易诱发振动和冲击，损坏钻柱连接扣、孔下测控仪器等；使用孔下动力钻具，特别是涡轮钻具驱动钻头钻进破岩，当钻进扭矩过大时，容易导致钻头停止旋转，以致无法取得进尺；特别是在复杂地层中，这种现象经常发生，极大地影响了钻进的效率和钻进安全。一般采取控制钻井参数的方式使其平稳，降低孔底旋转振动的危害，并加大对孔下仪器的减振设计以降低其伤害，但这些方法无法从根本上有效控制和降低旋转振动，难以取得良好的控制效果。In the prior art, there are usually two main ways to drive the drill bit rotation: surface drive (turntable or top drive) and downhole power drill drive. When the ground driving form is used, a large amount of torsional energy is often accumulated in the drill string, forming a torsion spring to accumulate potential energy. In complex formations, it is easy to induce vibration and impact, and damage the drill string connection buckle, downhole measurement and control instruments, etc.; Power drills, especially turbo drills, drive the drill bit to drill into broken rock. When the drilling torque is too large, it is easy to cause the drill bit to stop rotating, so that the footage cannot be obtained; especially in complex formations, this phenomenon often occurs and greatly Affected drilling efficiency and drilling safety. Generally, drilling parameters are controlled to make them stable and reduce the harm of the rotational vibration at the bottom of the hole, and the vibration reduction design of the downhole instrument is increased to reduce its damage. However, these methods cannot fundamentally effectively control and reduce the rotational vibration, and it is difficult to achieve good control effect.
发明内容Contents of the invention
针对现有技术中存在的不足，本发明的目的在于提供一种全金属的孔下扭矩实时调节工具，减少钻进过程中钻头与孔底的卡-滑效应，预防钻具累计过高扭矩能量，并将该能量用于切削破岩过程中降低钻头发生停止转动而导致无法取得进尺的风险。尤其是在高温井中配合涡轮钻具使用这套工具，克服涡轮钻具在大扭矩大钻压工况下的制动“失速”现象。In view of the deficiencies in the prior art, the purpose of the present invention is to provide an all-metal downhole torque real-time adjustment tool, which can reduce the stuck-slip effect between the drill bit and the bottom of the hole during the drilling process, and prevent the drill tool from accumulating excessive torque energy , and use this energy in the process of cutting rock to reduce the risk that the drill bit stops rotating and the footage cannot be obtained. Especially in high-temperature wells, use this set of tools with turbodrills to overcome the brake "stall" phenomenon of turbodrills under high-torque and high-weight-on-bit conditions.
本发明的技术方案是这样实现的：Technical scheme of the present invention is realized like this:
一种孔底动力钻具耐高温防失速节，包括外筒体、上传动轴、下传动轴、扭簧、卡瓦和预紧套，所述上传动轴的下端插入到所述下传动轴内并通过多头螺纹连接，在所述上传动轴和所述下传动轴连接处预留空间，所述外筒体套在所述上传动轴和所述下传动轴外，所述扭簧固定套在所述上传动轴上，所述扭簧下端与所述下传动轴顶部固定连接，所述下传动轴上部中空且为多个成环形均匀分布的抱爪，多个所述抱爪朝向轴心倾斜，在相邻两个抱爪之间的空隙间装有卡瓦，所述卡瓦和所述抱爪外表面为锥面，所述卡瓦外侧套有预紧套，所述预紧套与所述卡瓦之间通过螺纹咬合在一起。A high-temperature-resistant stall-proof joint of a power drilling tool at the bottom of a hole, including an outer cylinder, an upper transmission shaft, a lower transmission shaft, a torsion spring, slips and a pre-tightening sleeve, the lower end of the upper transmission shaft is inserted into the lower transmission shaft It is internally connected by multi-threaded threads, and a space is reserved at the connection between the upper transmission shaft and the lower transmission shaft, the outer cylinder is sleeved on the upper transmission shaft and the lower transmission shaft, and the torsion spring is fixed Sleeved on the upper transmission shaft, the lower end of the torsion spring is fixedly connected to the top of the lower transmission shaft. The upper part of the lower transmission shaft is hollow and has a plurality of ring-shaped and evenly distributed holding claws. The multiple holding claws face The shaft center is inclined, and slips are installed in the gap between two adjacent claws. The outer surfaces of the slips and the claws are conical surfaces, and the outside of the slips is covered with a pre-tightening sleeve. The tight sleeve and the slips are engaged together through threads.
上述的孔底动力钻具耐高温防失速节，所述扭簧的个数对应所述抱爪的数量，多个所述扭簧螺旋套在一起，在所述抱爪上表面开有安装孔，每个所述扭簧下端的连接柱对应插入到一个所述安装孔内。In the above-mentioned high-temperature-resistant stall-proof joint of the power drilling tool at the bottom of the hole, the number of the torsion springs corresponds to the number of the holding claws, a plurality of the torsion springs are helically sleeved together, and a mounting hole is opened on the upper surface of the holding claws , the connecting column at the lower end of each torsion spring is correspondingly inserted into one of the mounting holes.
上述的孔底动力钻具耐高温防失速节，还包括直线轴承和轴承座，所述下传动轴穿过所述直线轴承，所述轴承座与所述外筒体下端固定连接，所述直线轴承被所述轴承座封装在所述外筒体内。The above-mentioned high-temperature-resistant and anti-stall joint of the power drilling tool at the bottom of the hole also includes a linear bearing and a bearing seat, the lower transmission shaft passes through the linear bearing, the bearing seat is fixedly connected to the lower end of the outer cylinder, and the linear The bearing is encapsulated in the outer cylinder by the bearing seat.
上述的孔底动力钻具耐高温防失速节，所述卡瓦内壁设有金属垫衬。In the above-mentioned high-temperature anti-stall joint of the power drilling tool at the bottom of the hole, the inner wall of the slip is provided with a metal pad.
上述的孔底动力钻具耐高温防失速节，所述抱爪为3个，对应所述扭簧为三个，三个所述抱爪成环形均匀分布，三个所述扭簧螺旋套在一起，每个所述扭簧下端的连接柱插入相应所述抱爪上表面的安装孔内。The above-mentioned high-temperature-resistant stall-proof joint of the power drilling tool at the bottom of the hole has three holding claws, corresponding to three torsion springs, and the three holding claws are evenly distributed in a ring shape, and the three torsion spring helical sleeves are in the Together, the connecting post at the lower end of each torsion spring is inserted into the mounting hole on the upper surface of the corresponding claw.
上述的孔底动力钻具耐高温防失速节，所述上传动轴和下传动轴均中空贯通。In the above-mentioned high-temperature-resistant stall-proof joint of the power drilling tool for the bottom of a hole, the upper transmission shaft and the lower transmission shaft are both hollow and through.
上述的孔底动力钻具耐高温防失速节，所述下传动轴的下端具有石油标准公锥螺纹。In the above-mentioned high-temperature-resistant and anti-stall joint of the power drilling tool at the bottom of the hole, the lower end of the lower transmission shaft has a petroleum standard male taper thread.
上述的孔底动力钻具耐高温防失速节，所述上传动轴的上端设有内六方插口。In the above-mentioned high-temperature-resistant stall-resistant joint of the power drilling tool at the bottom of the hole, the upper end of the upper transmission shaft is provided with an inner hexagonal socket.
上述的孔底动力钻具耐高温防失速节，所述外筒体上端为标准石油锥螺纹。In the above-mentioned high-temperature-resistant stall-resistant joint of the power drilling tool at the bottom of the hole, the upper end of the outer cylinder is a standard petroleum taper thread.
上述的孔底动力钻具耐高温防失速节，在所述上传动轴和所述下传动轴连接处的下方设置有台肩，台肩设置在下传动轴腔内且与下传动轴固定连接，台肩正对上传动轴底端以防止上传动轴脱落。The above-mentioned high-temperature-resistant stall-resistant section of the power drilling tool at the bottom of the hole is provided with a shoulder below the connection between the upper transmission shaft and the lower transmission shaft, and the shoulder is arranged in the cavity of the lower transmission shaft and is fixedly connected with the lower transmission shaft. The shoulder is facing the bottom end of the upper transmission shaft to prevent the upper transmission shaft from falling off.
本发明的有益效果是：孔底动力钻具耐高温防失速节减少钻进过程中钻头与孔底的卡-滑效应，预防钻具累计过高扭矩能量，并将该能量用于降低切削破岩过程中钻头发生停止转动而导致无法取得进尺的风险。尤其是在高温井中配合涡轮钻具的下部使用本发明，克服涡轮钻具在大扭矩大钻压工况下的制动“失速”现象。The beneficial effects of the present invention are: the high-temperature-resistant anti-stall joint of the power drilling tool at the bottom of the hole reduces the stuck-slip effect between the drill bit and the bottom of the hole during the drilling process, prevents the drill tool from accumulating excessive torque energy, and uses the energy to reduce cutting damage. There is a risk that the drill bit will stop rotating during the rock process, resulting in the failure to obtain footage. Especially in high-temperature wells, the present invention is used in conjunction with the lower part of the turbodrill to overcome the braking "stall" phenomenon of the turbodrill under the working conditions of high torque and high drilling pressure.
附图说明Description of drawings
图1为本发明孔底动力钻具耐高温防失速节的结构示意图，Fig. 1 is the structural representation of the high-temperature-resistant anti-stall section of the power drilling tool at the bottom of the hole of the present invention,
图2为本发明孔底动力钻具耐高温防失速节的上传动轴的结构示意图，Fig. 2 is the structural representation of the upper drive shaft of the high temperature resistant stall prevention joint of the power drilling tool at the bottom of the hole of the present invention,
图3为本发明孔底动力钻具耐高温防失速节的下传动轴的结构示意图，Fig. 3 is a structural schematic diagram of the lower transmission shaft of the high temperature resistant stall prevention joint of the power drilling tool at the bottom of the hole of the present invention,
图4为本发明孔底动力钻具耐高温防失速节的外筒体的结构示意图，Fig. 4 is a structural schematic diagram of the outer cylinder of the high-temperature-resistant stall-proof joint of the power drilling tool at the bottom of the hole of the present invention,
图5为本发明孔底动力钻具耐高温防失速节的卡瓦的结构示意图，Fig. 5 is a structural schematic diagram of the slips of the high-temperature-resistant anti-stall joint of the power drilling tool at the bottom of the hole of the present invention,
图6为本发明孔底动力钻具耐高温防失速节的卡瓦、抱爪和预紧套配合结构示意图，Fig. 6 is a schematic diagram of the cooperation structure of slips, claws and pre-tightening sleeve of the high-temperature-resistant anti-stall joint of the power drilling tool at the bottom of the hole of the present invention,
图7为本发明孔底动力钻具耐高温防失速节的三个扭簧螺旋套在一起的结构示意图，Fig. 7 is a structural schematic diagram of three torsion spring helical sleeves of the high temperature resistant anti-stall joint of the power drilling tool at the bottom of the hole of the present invention,
图8为本发明孔底动力钻具耐高温防失速节的预紧套的结构示意图。Fig. 8 is a structural schematic diagram of the preloading sleeve of the high-temperature-resistant anti-stall joint of the power drilling tool at the bottom of the hole according to the present invention.
图中：1-外筒体，2-上传动轴，3-下传动轴，4-抱爪，5-卡瓦，6-预紧套，7-直线轴承，8-轴承座，9-台肩，10-扭簧。In the figure: 1-outer cylinder, 2-upper drive shaft, 3-lower drive shaft, 4-claw, 5-slips, 6-preload sleeve, 7-linear bearing, 8-bearing seat, 9-set Shoulder, 10-torsion spring.
具体实施方式Detailed ways
结合附图对本发明做进一步的说明：The present invention will be further described in conjunction with accompanying drawing:
如图1所示，一种孔底动力钻具耐高温防失速节，包括外筒体1、上传动轴2、下传动轴3、扭簧10、卡瓦5和预紧套6，所述上传动轴2的下端插入到所述下传动轴3内并通过多头螺纹连接，，在所述上传动轴2和所述下传动轴3连接处预留空间，所述外筒体1套在所述上传动轴2和所述下传动轴3外，所述扭簧10固定套在所述上传动轴2上，所述扭簧10下端与所述下传动轴3顶部固定连接，所述下传动轴3上部中空且为3个成环形均匀分布的抱爪4，3个所述抱爪4朝向轴心倾斜，在相邻两个抱爪4之间的空隙间装有卡瓦5，所述卡瓦5和所述抱爪4外表面为锥面，所述卡瓦5外侧套有预紧套6，所述预紧套6与所述卡瓦5之间通过螺纹咬合在一起，卡瓦5用以胀紧倾斜设置的抱爪4，调节预紧力矩时，预紧套6压紧卡瓦5，卡瓦5则胀紧抱爪4使抱爪4向内抱紧上传动轴2。As shown in Figure 1, a high-temperature-resistant and anti-stall joint of a power drilling tool at the bottom of a hole includes an outer cylinder 1, an upper transmission shaft 2, a lower transmission shaft 3, a torsion spring 10, slips 5 and a preload sleeve 6, the The lower end of the upper transmission shaft 2 is inserted into the lower transmission shaft 3 and connected by multiple threads, and a space is reserved at the joint between the upper transmission shaft 2 and the lower transmission shaft 3, and the outer cylinder 1 is sleeved on Outside the upper transmission shaft 2 and the lower transmission shaft 3, the torsion spring 10 is fixedly sleeved on the upper transmission shaft 2, the lower end of the torsion spring 10 is fixedly connected to the top of the lower transmission shaft 3, and the The upper part of the lower transmission shaft 3 is hollow and has three claws 4 evenly distributed in a ring shape. The three claws 4 are inclined towards the axis center, and slips 5 are installed in the gap between two adjacent claws 4. The outer surface of the slip 5 and the claw 4 is a tapered surface, and the outer side of the slip 5 is covered with a pre-tightening sleeve 6, and the pre-tightening sleeve 6 and the slip 5 are engaged together by threads, Slips 5 are used to expand and tighten the claws 4 that are set at an angle. When adjusting the pre-tightening torque, the pre-tightening sleeve 6 presses the slips 5, and the slips 5 expand and tighten the claws 4 so that the claws 4 hug the upper transmission shaft inwardly. 2.
如图7所示，所述扭簧10的个数对应所述抱爪4的数量也为三个，3个所述扭簧10螺旋套在一起，在所述抱爪4上表面开有安装孔，每个所述扭簧10下端的连接柱对应插入到一个所述安装孔内，3个扭簧10螺旋套在一起使用可以增加扭矩，而且扭簧10个数和抱爪4的个数也可根据预紧力矩的大小设定。As shown in Figure 7, the number of the torsion springs 10 corresponding to the number of the claws 4 is also three, and the three torsion springs 10 are helically sheathed together, and there is an installation on the upper surface of the claws 4. hole, the connecting column at the lower end of each torsion spring 10 is correspondingly inserted into one of the mounting holes, and the use of three torsion spring 10 spiral sleeves together can increase the torque, and the number of 10 torsion springs and the number of claws 4 It can also be set according to the size of the pre-tightening torque.
如图1所示，还包括直线轴承7和轴承座8，所述下传动轴3穿过所述直线轴承7，所述轴承座8与所述外筒体1下端固定连接，所述直线轴承7被所述轴承座8封装在所述外筒体1内。As shown in Figure 1, it also includes a linear bearing 7 and a bearing seat 8, the lower transmission shaft 3 passes through the linear bearing 7, the bearing seat 8 is fixedly connected with the lower end of the outer cylinder 1, and the linear bearing 7 is encapsulated in the outer cylinder 1 by the bearing seat 8 .
如图5所示，所述卡瓦5内壁设有金属垫衬，金属垫衬耐磨，避免需要经常更换零件的烦恼。As shown in Figure 5, the inner wall of the slips 5 is provided with a metal pad, which is wear-resistant and avoids the trouble of frequent replacement of parts.
如图1、图2和图3所示，所述上传动轴2和下传动轴3均中空贯通，中空贯通的结构作为泥浆通道。As shown in FIG. 1 , FIG. 2 and FIG. 3 , the upper transmission shaft 2 and the lower transmission shaft 3 are hollow and through, and the hollow through structure serves as a mud channel.
如图1和图3所示，所述下传动轴3的下端具有石油标准公锥螺纹连接钻具。As shown in Fig. 1 and Fig. 3, the lower end of the lower transmission shaft 3 has a petroleum standard male taper thread to connect the drilling tool.
如图1和图2所示，所述上传动轴2的上端设有内六方插口，内六方插口用以孔底动力钻具的下端插入。As shown in Fig. 1 and Fig. 2, the upper end of the upper transmission shaft 2 is provided with an inner hexagonal socket, and the inner hexagonal socket is used for inserting the lower end of the power drilling tool at the bottom of the hole.
如图1和图4所示，所述外筒体1上端为标准石油锥螺纹，锥螺纹用以与钻柱或者孔底马达的定子拧在一起，而且在外筒体1上还加工有安装止口，便于拧卸。As shown in Figures 1 and 4, the upper end of the outer cylinder 1 is a standard oil taper thread, which is used to screw together with the drill string or the stator of the bottom-hole motor, and the outer cylinder 1 is also processed with a mounting stop. mouth, easy to unscrew.
如图1和图3所示，在所述上传动轴2和所述下传动轴3连接处的下方设置有台肩9，台肩9可以防止上传动轴2脱落。As shown in FIG. 1 and FIG. 3 , a shoulder 9 is provided below the connection between the upper transmission shaft 2 and the lower transmission shaft 3 , and the shoulder 9 can prevent the upper transmission shaft 2 from falling off.
孔底动力钻具耐高温防失速节工作过程：The working process of the high temperature and anti-stall section of the power drilling tool at the bottom of the hole:
钻进工作时，孔底动力钻具的下端与孔底动力钻具耐高温防失速节的上端连接，孔底动力钻具耐高温防失速节的下端与钻头连接。如图6和图8所示，通过调节预紧套6调节预紧力矩，当钻进扭矩小于预紧力矩时，上传动轴2、下传动轴3、卡瓦5、扭簧10、预紧套6之间均无相对运动，外筒体1内部的结构完全作为一个整体随孔底动力钻具一起旋转，并带动钻头旋转。During drilling work, the lower end of the bottom-hole power drilling tool is connected with the upper end of the high-temperature-resistant stall-proof joint of the bottom-hole power drilling tool, and the lower end of the high-temperature-resistant stall-proof joint of the bottom-hole power drilling tool is connected with the drill bit. As shown in Figure 6 and Figure 8, the preload torque is adjusted by adjusting the preload sleeve 6. When the drilling torque is less than the preload torque, the upper transmission shaft 2, the lower transmission shaft 3, the slips 5, the torsion spring 10, There is no relative movement between the sleeves 6, and the structure inside the outer cylinder 1 is completely rotated as a whole with the power drilling tool at the bottom of the hole, and drives the drill bit to rotate.
当钻进扭矩达到足以克服预紧力矩时，将导致卡瓦5和上传动轴2之间出现滑动，下传动轴3克服弹簧的扭力向上滑动，直线轴承7具有导向和扶正下传动轴3的作用(在此实施例中选用耐磨抗高温的金刚石扶正轴承)，下传动轴3向上滑动会引起下方连接的钻头从孔底提升，钻头与孔底脱离接触后，钻头就会逐渐从慢速，甚至制动状态恢复到全转速状态；当作用于孔底动力钻具耐高温防失速节上的转矩降低时，孔底动力钻具耐高温防失速节在扭簧10的反作用下将活肤到初始状态，孔底动力钻具耐高温防失速节各机构回归初始位置，钻头继续钻进。When the drilling torque reaches enough to overcome the pre-tightening torque, it will cause slips between the slips 5 and the upper drive shaft 2, and the lower drive shaft 3 will slide upward against the torsion of the spring, and the linear bearing 7 has the function of guiding and straightening the lower drive shaft 3 Effect (in this embodiment, wear-resistant and high-temperature resistant diamond centering bearings are selected), the upward sliding of the lower drive shaft 3 will cause the drill bit connected below to lift from the bottom of the hole, and after the drill bit is out of contact with the bottom of the hole, the drill bit will gradually start from the slow speed. , and even the braking state returns to the full rotational speed state; when the torque applied to the high temperature anti-stall joint of the power drilling tool at the bottom of the hole is reduced, the high temperature anti-stall joint of the power drilling tool at the bottom of the hole will be activated under the reaction of the torsion spring 10 When the skin reaches the initial state, the various mechanisms of the high temperature resistant anti-stall section of the power drilling tool at the bottom of the hole return to the initial position, and the drill bit continues to drill.
本发明孔底动力钻具耐高温防失速节的所有组成部件(上传动轴2、下传动轴3、轴承座8、预紧套6、外筒体1以及扭簧10等)均为金属部件和耐高温部件，可以在300℃以上的高温环境中使用。All the components (upper transmission shaft 2, lower transmission shaft 3, bearing seat 8, pre-tightening sleeve 6, outer cylinder 1 and torsion spring 10, etc.) of the high-temperature-resistant stall-proof joint of the hole bottom power drilling tool of the present invention are metal parts And high temperature resistant parts, can be used in high temperature environment above 300 ℃.
上述实施例仅仅是为清楚地说明本发明创造所作的举例，而并非对本发明创造具体实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所引伸出的任何显而易见的变化或变动仍处于本发明创造权利要求的保护范围之中。The above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the specific implementation manner of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. Any obvious changes or modifications derived from the spirit and principles of the present invention are still within the protection scope of the claims of the present invention.
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| CN109538112B (en) * | 2019-01-04 | 2023-09-08 | 中国地质大学（北京） | Processing method of sleeved spliced all-metal screw stator |
| CN109915044B (en) * | 2019-03-22 | 2023-11-21 | 中国地质大学（北京） | Axial machining and assembling process for metal stator of assembled screw drilling tool |
| CN110593752B (en) * | 2019-10-22 | 2024-03-22 | 中国地质大学（北京） | All-metal underground power drilling tool based on multistage double-plunger-eccentric gear mechanism |
| CN117967215B (en) * | 2024-03-29 | 2024-06-04 | 江苏诚创智能装备有限公司 | Six binding clip power slips |
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| CN101319596A (en) * | 2008-07-18 | 2008-12-10 | 石家庄中煤装备制造有限公司 | Short distance speed-increasing type hard rock deep borehole drilling device |
| CN102913143A (en) * | 2012-10-30 | 2013-02-06 | 陕西高新能源发展有限公司 | Casing driving device |
| CN203321370U (en) * | 2013-05-08 | 2013-12-04 | 中国地质大学（北京） | Hole bottom power drilling tool high-temperature-resistant stall prevention joint |
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| EP0920566B1 (en) * | 1996-08-23 | 2001-01-31 | Brooks H. Javins | Rotary-percussion drill apparatus and method |
| CN101319596A (en) * | 2008-07-18 | 2008-12-10 | 石家庄中煤装备制造有限公司 | Short distance speed-increasing type hard rock deep borehole drilling device |
| CN102913143A (en) * | 2012-10-30 | 2013-02-06 | 陕西高新能源发展有限公司 | Casing driving device |
| CN203321370U (en) * | 2013-05-08 | 2013-12-04 | 中国地质大学（北京） | Hole bottom power drilling tool high-temperature-resistant stall prevention joint |
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